code.delx.au - pulseaudio/blob - src/modules/module-ladspa-sink.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2008 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 /* TODO: Some plugins cause latency, and some even report it by using a control
  23    out port. We don't currently use the latency information. */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <pulse/xmalloc.h>
  30
  31 #include <pulsecore/core-error.h>
  32 #include <pulsecore/namereg.h>
  33 #include <pulsecore/sink.h>
  34 #include <pulsecore/module.h>
  35 #include <pulsecore/core-util.h>
  36 #include <pulsecore/modargs.h>
  37 #include <pulsecore/log.h>
  38 #include <pulsecore/thread.h>
  39 #include <pulsecore/thread-mq.h>
  40 #include <pulsecore/rtpoll.h>
  41 #include <pulsecore/sample-util.h>
  42 #include <pulsecore/ltdl-helper.h>
  43
  44 #include "module-ladspa-sink-symdef.h"
  45 #include "ladspa.h"
  46
  47 PA_MODULE_AUTHOR("Lennart Poettering");
  48 PA_MODULE_DESCRIPTION("Virtual LADSPA sink");
  49 PA_MODULE_VERSION(PACKAGE_VERSION);
  50 PA_MODULE_LOAD_ONCE(FALSE);
  51 PA_MODULE_USAGE(
  52         "sink_name=<name for the sink> "
  53         "sink_properties=<properties for the sink> "
  54         "master=<name of sink to remap> "
  55         "format=<sample format> "
  56         "rate=<sample rate> "
  57         "channels=<number of channels> "
  58         "channel_map=<channel map> "
  59         "plugin=<ladspa plugin name> "
  60         "label=<ladspa plugin label> "
  61         "control=<comma seperated list of input control values>");
  62
  63 #define MEMBLOCKQ_MAXLENGTH (16*1024*1024)
  64
  65 struct userdata {
  66     pa_core *core;
  67     pa_module *module;
  68
  69     pa_sink *sink, *master;
  70     pa_sink_input *sink_input;
  71
  72     const LADSPA_Descriptor *descriptor;
  73     unsigned channels;
  74     LADSPA_Handle handle[PA_CHANNELS_MAX];
  75     LADSPA_Data *input, *output;
  76     size_t block_size;
  77     unsigned long input_port, output_port;
  78     LADSPA_Data *control;
  79
  80     /* This is a dummy buffer. Every port must be connected, but we don't care
  81        about control out ports. We connect them all to this single buffer. */
  82     LADSPA_Data control_out;
  83
  84     pa_memblockq *memblockq;
  85 };
  86
  87 static const char* const valid_modargs[] = {
  88     "sink_name",
  89     "sink_properties",
  90     "master",
  91     "format",
  92     "rate",
  93     "channels",
  94     "channel_map",
  95     "plugin",
  96     "label",
  97     "control",
  98     NULL
  99 };
 100
 101 /* Called from I/O thread context */
 102 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 103     struct userdata *u = PA_SINK(o)->userdata;
 104
 105     switch (code) {
 106
 107         case PA_SINK_MESSAGE_GET_LATENCY: {
 108             pa_usec_t usec = 0;
 109
 110             /* Get the latency of the master sink */
 111             if (PA_MSGOBJECT(u->master)->process_msg(PA_MSGOBJECT(u->master), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 112                 usec = 0;
 113
 114             /* Add the latency internal to our sink input on top */
 115             usec += pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->master->sample_spec);
 116
 117             *((pa_usec_t*) data) = usec;
 118             return 0;
 119         }
 120     }
 121
 122     return pa_sink_process_msg(o, code, data, offset, chunk);
 123 }
 124
 125 /* Called from main context */
 126 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
 127     struct userdata *u;
 128
 129     pa_sink_assert_ref(s);
 130     pa_assert_se(u = s->userdata);
 131
 132     if (PA_SINK_IS_LINKED(state) &&
 133         u->sink_input &&
 134         PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
 135
 136         pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
 137
 138     return 0;
 139 }
 140
 141 /* Called from I/O thread context */
 142 static void sink_request_rewind(pa_sink *s) {
 143     struct userdata *u;
 144
 145     pa_sink_assert_ref(s);
 146     pa_assert_se(u = s->userdata);
 147
 148     /* Just hand this one over to the master sink */
 149     pa_sink_input_request_rewind(u->sink_input, s->thread_info.rewind_nbytes + pa_memblockq_get_length(u->memblockq), TRUE, FALSE, FALSE);
 150 }
 151
 152 /* Called from I/O thread context */
 153 static void sink_update_requested_latency(pa_sink *s) {
 154     struct userdata *u;
 155
 156     pa_sink_assert_ref(s);
 157     pa_assert_se(u = s->userdata);
 158
 159     /* Just hand this one over to the master sink */
 160     pa_sink_input_set_requested_latency_within_thread(
 161             u->sink_input,
 162             pa_sink_get_requested_latency_within_thread(s));
 163 }
 164
 165 /* Called from I/O thread context */
 166 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 167     struct userdata *u;
 168     float *src, *dst;
 169     size_t fs;
 170     unsigned n, c;
 171     pa_memchunk tchunk;
 172
 173     pa_sink_input_assert_ref(i);
 174     pa_assert(chunk);
 175     pa_assert_se(u = i->userdata);
 176
 177     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 178         return -1;
 179
 180     while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) {
 181         pa_memchunk nchunk;
 182
 183         pa_sink_render(u->sink, nbytes, &nchunk);
 184         pa_memblockq_push(u->memblockq, &nchunk);
 185         pa_memblock_unref(nchunk.memblock);
 186     }
 187
 188     tchunk.length = PA_MIN(nbytes, tchunk.length);
 189     pa_assert(tchunk.length > 0);
 190
 191     fs = pa_frame_size(&i->sample_spec);
 192     n = (unsigned) (PA_MIN(tchunk.length, u->block_size) / fs);
 193
 194     pa_assert(n > 0);
 195
 196     chunk->index = 0;
 197     chunk->length = n*fs;
 198     chunk->memblock = pa_memblock_new(i->sink->core->mempool, chunk->length);
 199
 200     pa_memblockq_drop(u->memblockq, chunk->length);
 201
 202     src = (float*) ((uint8_t*) pa_memblock_acquire(tchunk.memblock) + tchunk.index);
 203     dst = (float*) pa_memblock_acquire(chunk->memblock);
 204
 205     for (c = 0; c < u->channels; c++) {
 206         pa_sample_clamp(PA_SAMPLE_FLOAT32NE, u->input, sizeof(float), src+c, u->channels*sizeof(float), n);
 207         u->descriptor->run(u->handle[c], n);
 208         pa_sample_clamp(PA_SAMPLE_FLOAT32NE, dst+c, u->channels*sizeof(float), u->output, sizeof(float), n);
 209     }
 210
 211     pa_memblock_release(tchunk.memblock);
 212     pa_memblock_release(chunk->memblock);
 213
 214     pa_memblock_unref(tchunk.memblock);
 215
 216     return 0;
 217 }
 218
 219 /* Called from I/O thread context */
 220 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
 221     struct userdata *u;
 222     size_t amount = 0;
 223
 224     pa_sink_input_assert_ref(i);
 225     pa_assert_se(u = i->userdata);
 226
 227     if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
 228         return;
 229
 230     if (u->sink->thread_info.rewind_nbytes > 0) {
 231         size_t max_rewrite;
 232
 233         max_rewrite = nbytes + pa_memblockq_get_length(u->memblockq);
 234         amount = PA_MIN(u->sink->thread_info.rewind_nbytes, max_rewrite);
 235         u->sink->thread_info.rewind_nbytes = 0;
 236
 237         if (amount > 0) {
 238             unsigned c;
 239
 240             pa_memblockq_seek(u->memblockq, - (int64_t) amount, PA_SEEK_RELATIVE, TRUE);
 241
 242             pa_log_debug("Resetting plugin");
 243
 244             /* Reset the plugin */
 245             if (u->descriptor->deactivate)
 246                 for (c = 0; c < u->channels; c++)
 247                     u->descriptor->deactivate(u->handle[c]);
 248             if (u->descriptor->activate)
 249                 for (c = 0; c < u->channels; c++)
 250                     u->descriptor->activate(u->handle[c]);
 251         }
 252     }
 253
 254     pa_sink_process_rewind(u->sink, amount);
 255     pa_memblockq_rewind(u->memblockq, nbytes);
 256 }
 257
 258 /* Called from I/O thread context */
 259 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 260     struct userdata *u;
 261
 262     pa_sink_input_assert_ref(i);
 263     pa_assert_se(u = i->userdata);
 264
 265     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 266         return;
 267
 268     pa_memblockq_set_maxrewind(u->memblockq, nbytes);
 269     pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
 270 }
 271
 272 /* Called from I/O thread context */
 273 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
 274     struct userdata *u;
 275
 276     pa_sink_input_assert_ref(i);
 277     pa_assert_se(u = i->userdata);
 278
 279     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 280         return;
 281
 282     pa_sink_set_max_request_within_thread(u->sink, nbytes);
 283 }
 284
 285 /* Called from I/O thread context */
 286 static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
 287     struct userdata *u;
 288
 289     pa_sink_input_assert_ref(i);
 290     pa_assert_se(u = i->userdata);
 291
 292     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 293         return;
 294
 295     pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
 296 }
 297
 298 /* Called from I/O thread context */
 299 static void sink_input_detach_cb(pa_sink_input *i) {
 300     struct userdata *u;
 301
 302     pa_sink_input_assert_ref(i);
 303     pa_assert_se(u = i->userdata);
 304
 305     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 306         return;
 307
 308     pa_sink_detach_within_thread(u->sink);
 309     pa_sink_set_asyncmsgq(u->sink, NULL);
 310     pa_sink_set_rtpoll(u->sink, NULL);
 311 }
 312
 313 /* Called from I/O thread context */
 314 static void sink_input_attach_cb(pa_sink_input *i) {
 315     struct userdata *u;
 316
 317     pa_sink_input_assert_ref(i);
 318     pa_assert_se(u = i->userdata);
 319
 320     if (!u->sink || !PA_SINK_IS_LINKED(u->sink->thread_info.state))
 321         return;
 322
 323     pa_sink_set_asyncmsgq(u->sink, i->sink->asyncmsgq);
 324     pa_sink_set_rtpoll(u->sink, i->sink->rtpoll);
 325     pa_sink_attach_within_thread(u->sink);
 326
 327     pa_sink_set_latency_range_within_thread(u->sink, u->master->thread_info.min_latency, u->master->thread_info.max_latency);
 328 }
 329
 330 /* Called from main context */
 331 static void sink_input_kill_cb(pa_sink_input *i) {
 332     struct userdata *u;
 333
 334     pa_sink_input_assert_ref(i);
 335     pa_assert_se(u = i->userdata);
 336
 337     pa_sink_unlink(u->sink);
 338     pa_sink_input_unlink(u->sink_input);
 339
 340     pa_sink_unref(u->sink);
 341     u->sink = NULL;
 342     pa_sink_input_unref(u->sink_input);
 343     u->sink_input = NULL;
 344
 345     pa_module_unload_request(u->module, TRUE);
 346 }
 347
 348 /* Called from IO thread context */
 349 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
 350     struct userdata *u;
 351
 352     pa_sink_input_assert_ref(i);
 353     pa_assert_se(u = i->userdata);
 354
 355     /* If we are added for the first time, ask for a rewinding so that
 356      * we are heard right-away. */
 357     if (PA_SINK_INPUT_IS_LINKED(state) &&
 358         i->thread_info.state == PA_SINK_INPUT_INIT) {
 359         pa_log_debug("Requesting rewind due to state change.");
 360         pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
 361     }
 362 }
 363
 364 /* Called from main context */
 365 static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
 366     struct userdata *u;
 367
 368     pa_sink_input_assert_ref(i);
 369     pa_assert_se(u = i->userdata);
 370
 371     return u->sink != dest;
 372 }
 373
 374 int pa__init(pa_module*m) {
 375     struct userdata *u;
 376     pa_sample_spec ss;
 377     pa_channel_map map;
 378     pa_modargs *ma;
 379     char *t;
 380     const char *z;
 381     pa_sink *master;
 382     pa_sink_input_new_data sink_input_data;
 383     pa_sink_new_data sink_data;
 384     const char *plugin, *label;
 385     LADSPA_Descriptor_Function descriptor_func;
 386     const char *e, *cdata;
 387     const LADSPA_Descriptor *d;
 388     unsigned long input_port, output_port, p, j, n_control;
 389     unsigned c;
 390     pa_bool_t *use_default = NULL;
 391
 392     pa_assert(m);
 393
 394     pa_assert(sizeof(LADSPA_Data) == sizeof(float));
 395
 396     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 397         pa_log("Failed to parse module arguments.");
 398         goto fail;
 399     }
 400
 401     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) {
 402         pa_log("Master sink not found");
 403         goto fail;
 404     }
 405
 406     ss = master->sample_spec;
 407     ss.format = PA_SAMPLE_FLOAT32;
 408     map = master->channel_map;
 409     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 410         pa_log("Invalid sample format specification or channel map");
 411         goto fail;
 412     }
 413
 414     if (!(plugin = pa_modargs_get_value(ma, "plugin", NULL))) {
 415         pa_log("Missing LADSPA plugin name");
 416         goto fail;
 417     }
 418
 419     if (!(label = pa_modargs_get_value(ma, "label", NULL))) {
 420         pa_log("Missing LADSPA plugin label");
 421         goto fail;
 422     }
 423
 424     cdata = pa_modargs_get_value(ma, "control", NULL);
 425
 426     u = pa_xnew0(struct userdata, 1);
 427     u->core = m->core;
 428     u->module = m;
 429     m->userdata = u;
 430     u->master = master;
 431     u->sink = NULL;
 432     u->sink_input = NULL;
 433     u->memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0, pa_frame_size(&ss), 1, 1, 0, NULL);
 434
 435     if (!(e = getenv("LADSPA_PATH")))
 436         e = LADSPA_PATH;
 437
 438     /* FIXME: This is not exactly thread safe */
 439     t = pa_xstrdup(lt_dlgetsearchpath());
 440     lt_dlsetsearchpath(e);
 441     m->dl = lt_dlopenext(plugin);
 442     lt_dlsetsearchpath(t);
 443     pa_xfree(t);
 444
 445     if (!m->dl) {
 446         pa_log("Failed to load LADSPA plugin: %s", lt_dlerror());
 447         goto fail;
 448     }
 449
 450     if (!(descriptor_func = (LADSPA_Descriptor_Function) pa_load_sym(m->dl, NULL, "ladspa_descriptor"))) {
 451         pa_log("LADSPA module lacks ladspa_descriptor() symbol.");
 452         goto fail;
 453     }
 454
 455     for (j = 0;; j++) {
 456
 457         if (!(d = descriptor_func(j))) {
 458             pa_log("Failed to find plugin label '%s' in plugin '%s'.", label, plugin);
 459             goto fail;
 460         }
 461
 462         if (strcmp(d->Label, label) == 0)
 463             break;
 464     }
 465
 466     u->descriptor = d;
 467
 468     pa_log_debug("Module: %s", plugin);
 469     pa_log_debug("Label: %s", d->Label);
 470     pa_log_debug("Unique ID: %lu", d->UniqueID);
 471     pa_log_debug("Name: %s", d->Name);
 472     pa_log_debug("Maker: %s", d->Maker);
 473     pa_log_debug("Copyright: %s", d->Copyright);
 474
 475     input_port = output_port = (unsigned long) -1;
 476     n_control = 0;
 477
 478     for (p = 0; p < d->PortCount; p++) {
 479
 480         if (LADSPA_IS_PORT_INPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_AUDIO(d->PortDescriptors[p])) {
 481
 482             if (strcmp(d->PortNames[p], "Input") == 0) {
 483                 pa_assert(input_port == (unsigned long) -1);
 484                 input_port = p;
 485             } else {
 486                 pa_log("Found audio input port on plugin we cannot handle: %s", d->PortNames[p]);
 487                 goto fail;
 488             }
 489
 490         } else if (LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_AUDIO(d->PortDescriptors[p])) {
 491
 492             if (strcmp(d->PortNames[p], "Output") == 0) {
 493                 pa_assert(output_port == (unsigned long) -1);
 494                 output_port = p;
 495             } else {
 496                 pa_log("Found audio output port on plugin we cannot handle: %s", d->PortNames[p]);
 497                 goto fail;
 498             }
 499
 500         } else if (LADSPA_IS_PORT_INPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]))
 501             n_control++;
 502         else {
 503             pa_assert(LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p]) && LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]));
 504             pa_log_debug("Ignored control output port \"%s\".", d->PortNames[p]);
 505         }
 506     }
 507
 508     if ((input_port == (unsigned long) -1) || (output_port == (unsigned long) -1)) {
 509         pa_log("Failed to identify input and output ports. "
 510                "Right now this module can only deal with plugins which provide an 'Input' and an 'Output' audio port. "
 511                "Patches welcome!");
 512         goto fail;
 513     }
 514
 515     u->block_size = pa_frame_align(pa_mempool_block_size_max(m->core->mempool), &ss);
 516
 517     u->input = (LADSPA_Data*) pa_xnew(uint8_t, (unsigned) u->block_size);
 518     if (LADSPA_IS_INPLACE_BROKEN(d->Properties))
 519         u->output = (LADSPA_Data*) pa_xnew(uint8_t, (unsigned) u->block_size);
 520     else
 521         u->output = u->input;
 522
 523     u->channels = ss.channels;
 524
 525     for (c = 0; c < ss.channels; c++) {
 526         if (!(u->handle[c] = d->instantiate(d, ss.rate))) {
 527             pa_log("Failed to instantiate plugin %s with label %s for channel %i", plugin, d->Label, c);
 528             goto fail;
 529         }
 530
 531         d->connect_port(u->handle[c], input_port, u->input);
 532         d->connect_port(u->handle[c], output_port, u->output);
 533     }
 534
 535     if (!cdata && n_control > 0) {
 536         pa_log("This plugin requires specification of %lu control parameters.", n_control);
 537         goto fail;
 538     }
 539
 540     if (n_control > 0) {
 541         const char *state = NULL;
 542         char *k;
 543         unsigned long h;
 544
 545         u->control = pa_xnew(LADSPA_Data, (unsigned) n_control);
 546         use_default = pa_xnew(pa_bool_t, (unsigned) n_control);
 547         p = 0;
 548
 549         while ((k = pa_split(cdata, ",", &state)) && p < n_control) {
 550             double f;
 551
 552             if (*k == 0) {
 553                 use_default[p++] = TRUE;
 554                 pa_xfree(k);
 555                 continue;
 556             }
 557
 558             if (pa_atod(k, &f) < 0) {
 559                 pa_log("Failed to parse control value '%s'", k);
 560                 pa_xfree(k);
 561                 goto fail;
 562             }
 563
 564             pa_xfree(k);
 565
 566             use_default[p] = FALSE;
 567             u->control[p++] = (LADSPA_Data) f;
 568         }
 569
 570         /* The previous loop doesn't take the last control value into account
 571            if it is left empty, so we do it here. */
 572         if (*cdata == 0 || cdata[strlen(cdata) - 1] == ',') {
 573             if (p < n_control)
 574                 use_default[p] = TRUE;
 575             p++;
 576         }
 577
 578         if (p > n_control || k) {
 579             pa_log("Too many control values passed, %lu expected.", n_control);
 580             pa_xfree(k);
 581             goto fail;
 582         }
 583
 584         if (p < n_control) {
 585             pa_log("Not enough control values passed, %lu expected, %lu passed.", n_control, p);
 586             goto fail;
 587         }
 588
 589         h = 0;
 590         for (p = 0; p < d->PortCount; p++) {
 591             LADSPA_PortRangeHintDescriptor hint = d->PortRangeHints[p].HintDescriptor;
 592
 593             if (!LADSPA_IS_PORT_CONTROL(d->PortDescriptors[p]))
 594                 continue;
 595
 596             if (LADSPA_IS_PORT_OUTPUT(d->PortDescriptors[p])) {
 597                 for (c = 0; c < ss.channels; c++)
 598                     d->connect_port(u->handle[c], p, &u->control_out);
 599                 continue;
 600             }
 601
 602             pa_assert(h < n_control);
 603
 604             if (use_default[h]) {
 605                 LADSPA_Data lower, upper;
 606
 607                 if (!LADSPA_IS_HINT_HAS_DEFAULT(hint)) {
 608                     pa_log("Control port value left empty but plugin defines no default.");
 609                     goto fail;
 610                 }
 611
 612                 lower = d->PortRangeHints[p].LowerBound;
 613                 upper = d->PortRangeHints[p].UpperBound;
 614
 615                 if (LADSPA_IS_HINT_SAMPLE_RATE(hint)) {
 616                     lower *= (LADSPA_Data) ss.rate;
 617                     upper *= (LADSPA_Data) ss.rate;
 618                 }
 619
 620                 switch (hint & LADSPA_HINT_DEFAULT_MASK) {
 621
 622                     case LADSPA_HINT_DEFAULT_MINIMUM:
 623                         u->control[h] = lower;
 624                         break;
 625
 626                     case LADSPA_HINT_DEFAULT_MAXIMUM:
 627                         u->control[h] = upper;
 628                         break;
 629
 630                     case LADSPA_HINT_DEFAULT_LOW:
 631                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 632                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.75 + log(upper) * 0.25);
 633                         else
 634                             u->control[h] = (LADSPA_Data) (lower * 0.75 + upper * 0.25);
 635                         break;
 636
 637                     case LADSPA_HINT_DEFAULT_MIDDLE:
 638                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 639                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.5 + log(upper) * 0.5);
 640                         else
 641                             u->control[h] = (LADSPA_Data) (lower * 0.5 + upper * 0.5);
 642                         break;
 643
 644                     case LADSPA_HINT_DEFAULT_HIGH:
 645                         if (LADSPA_IS_HINT_LOGARITHMIC(hint))
 646                             u->control[h] = (LADSPA_Data) exp(log(lower) * 0.25 + log(upper) * 0.75);
 647                         else
 648                             u->control[h] = (LADSPA_Data) (lower * 0.25 + upper * 0.75);
 649                         break;
 650
 651                     case LADSPA_HINT_DEFAULT_0:
 652                         u->control[h] = 0;
 653                         break;
 654
 655                     case LADSPA_HINT_DEFAULT_1:
 656                         u->control[h] = 1;
 657                         break;
 658
 659                     case LADSPA_HINT_DEFAULT_100:
 660                         u->control[h] = 100;
 661                         break;
 662
 663                     case LADSPA_HINT_DEFAULT_440:
 664                         u->control[h] = 440;
 665                         break;
 666
 667                     default:
 668                         pa_assert_not_reached();
 669                 }
 670             }
 671
 672             if (LADSPA_IS_HINT_INTEGER(hint))
 673                 u->control[h] = roundf(u->control[h]);
 674
 675             pa_log_debug("Binding %f to port %s", u->control[h], d->PortNames[p]);
 676
 677             for (c = 0; c < ss.channels; c++)
 678                 d->connect_port(u->handle[c], p, &u->control[h]);
 679
 680             h++;
 681         }
 682
 683         pa_assert(h == n_control);
 684     }
 685
 686     if (d->activate)
 687         for (c = 0; c < u->channels; c++)
 688             d->activate(u->handle[c]);
 689
 690     /* Create sink */
 691     pa_sink_new_data_init(&sink_data);
 692     sink_data.driver = __FILE__;
 693     sink_data.module = m;
 694     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 695         sink_data.name = pa_sprintf_malloc("%s.ladspa", master->name);
 696     sink_data.namereg_fail = FALSE;
 697     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 698     pa_sink_new_data_set_channel_map(&sink_data, &map);
 699     z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 700     pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "LADSPA Plugin %s on %s", label, z ? z : master->name);
 701     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 702     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
 703     pa_proplist_sets(sink_data.proplist, "device.ladspa.module", plugin);
 704     pa_proplist_sets(sink_data.proplist, "device.ladspa.label", d->Label);
 705     pa_proplist_sets(sink_data.proplist, "device.ladspa.name", d->Name);
 706     pa_proplist_sets(sink_data.proplist, "device.ladspa.maker", d->Maker);
 707     pa_proplist_sets(sink_data.proplist, "device.ladspa.copyright", d->Copyright);
 708     pa_proplist_setf(sink_data.proplist, "device.ladspa.unique_id", "%lu", (unsigned long) d->UniqueID);
 709
 710     if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
 711         pa_log("Invalid properties");
 712         pa_sink_new_data_done(&sink_data);
 713         goto fail;
 714     }
 715
 716     u->sink = pa_sink_new(m->core, &sink_data, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY);
 717     pa_sink_new_data_done(&sink_data);
 718
 719     if (!u->sink) {
 720         pa_log("Failed to create sink.");
 721         goto fail;
 722     }
 723
 724     u->sink->parent.process_msg = sink_process_msg;
 725     u->sink->set_state = sink_set_state;
 726     u->sink->update_requested_latency = sink_update_requested_latency;
 727     u->sink->request_rewind = sink_request_rewind;
 728     u->sink->userdata = u;
 729
 730     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 731     pa_sink_set_rtpoll(u->sink, master->rtpoll);
 732
 733     /* Create sink input */
 734     pa_sink_input_new_data_init(&sink_input_data);
 735     sink_input_data.driver = __FILE__;
 736     sink_input_data.module = m;
 737     sink_input_data.sink = u->master;
 738     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "LADSPA Stream");
 739     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
 740     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 741     pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
 742
 743     pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, PA_SINK_INPUT_DONT_MOVE);
 744     pa_sink_input_new_data_done(&sink_input_data);
 745
 746     if (!u->sink_input)
 747         goto fail;
 748
 749     u->sink_input->pop = sink_input_pop_cb;
 750     u->sink_input->process_rewind = sink_input_process_rewind_cb;
 751     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
 752     u->sink_input->update_max_request = sink_input_update_max_request_cb;
 753     u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
 754     u->sink_input->kill = sink_input_kill_cb;
 755     u->sink_input->attach = sink_input_attach_cb;
 756     u->sink_input->detach = sink_input_detach_cb;
 757     u->sink_input->state_change = sink_input_state_change_cb;
 758     u->sink_input->may_move_to = sink_input_may_move_to_cb;
 759     u->sink_input->userdata = u;
 760
 761     pa_sink_put(u->sink);
 762     pa_sink_input_put(u->sink_input);
 763
 764     pa_modargs_free(ma);
 765
 766     pa_xfree(use_default);
 767
 768     return 0;
 769
 770 fail:
 771     if (ma)
 772         pa_modargs_free(ma);
 773
 774     pa_xfree(use_default);
 775
 776     pa__done(m);
 777
 778     return -1;
 779 }
 780
 781 int pa__get_n_used(pa_module *m) {
 782     struct userdata *u;
 783
 784     pa_assert(m);
 785     pa_assert_se(u = m->userdata);
 786
 787     return pa_sink_linked_by(u->sink);
 788 }
 789
 790 void pa__done(pa_module*m) {
 791     struct userdata *u;
 792     unsigned c;
 793
 794     pa_assert(m);
 795
 796     if (!(u = m->userdata))
 797         return;
 798
 799     if (u->sink) {
 800         pa_sink_unlink(u->sink);
 801         pa_sink_unref(u->sink);
 802     }
 803
 804     if (u->sink_input) {
 805         pa_sink_input_unlink(u->sink_input);
 806         pa_sink_input_unref(u->sink_input);
 807     }
 808
 809     for (c = 0; c < u->channels; c++)
 810         if (u->handle[c]) {
 811             if (u->descriptor->deactivate)
 812                 u->descriptor->deactivate(u->handle[c]);
 813             u->descriptor->cleanup(u->handle[c]);
 814         }
 815
 816     if (u->output != u->input)
 817         pa_xfree(u->output);
 818
 819     if (u->memblockq)
 820         pa_memblockq_free(u->memblockq);
 821
 822     pa_xfree(u->input);
 823
 824     pa_xfree(u->control);
 825
 826     pa_xfree(u);
 827 }